Instead, many used a scenario approach to conclude that solitary sessile polyps represent the ancestral cnidarian form. |
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With a worldwide fauna of at least 15,000 species, poriferans are among the most diverse of sessile marine taxa. |
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All are tree Euphorbias, have minute sessile leaves and yellowish cyathia but differ in other respects. |
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The leaves are cuneate oblong or linear oblong and either sessile or amplexicaul. |
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The objective of the study was to evaluate the utility of retroflexion for removal of large sessile colon polyps. |
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Half of the field will be planted with native ash, along with cherry, rowan and hazel trees, sessile oaks and downy birches. |
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Crinoids, together with brachiopods, dominated the Paleozoic sessile benthos. |
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The zoaea larva can be recognized by the flattened blade at the end of the telson, the smooth rostrum and the sessile eyes. |
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Plants are sessile organisms that had to develop strategies to adapt rapidly to changes in environmental conditions. |
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Plants are sessile, autotrophic, and grow in an indeterminate and modular manner. |
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Most starfish are predators, feeding on sessile or slow-moving prey such as mollusks and barnacles. |
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Most studies of invertebrate larval metamorphosis have been performed with species that are sedentary or sessile as adults. |
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Epizoic barnacles are sessile, marine crustaceans and constitute a model system featuring the above conditions. |
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Alternatively, competent larvae of many sessile invertebrate species do not progress toward metamorphosis if stimulatory cues are absent. |
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Most radially symmetric animals are sessile, however, echinoderms are able to move. |
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It frequently occurs in the lower uterine segment and may be either sessile or pedunculated. |
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The genus is about equally divided into two subgenera, those with pedicellate flowers and those with sessile flowers. |
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The tumors were described as pedunculated or sessile polypoid nodules or as cauliflower-like masses projecting into the lumen of the gallbladder. |
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It continues to grow with a dome shape, but it can be sessile or pedunculated. |
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We illustrate the method by considering the density of acorns fallen under a sessile oak during one season. |
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Most are motile animals, but members of the order Stauromedusae are sessile. |
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Large field maples will give height and density and will be underplanted with sessile oak and small leaf lime trees. |
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Feeding activity is monitored in a range of sessile filter feeders by direct observation of feeding structures. |
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The urochordates or tunicates are sessile marine filter-feeders, and rather sponge-like as adults. |
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As sessile animals, Ascidians or tunicates host secondary metabolites against predation and to compete for substrate. |
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The plants of 'Radiccho di Verona' PGI have whole, sessile leaves with smooth, unbroken edges, curving upwards to resemble a shower head. |
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Newly hatched nymphs attach themselves to the roots by their mouth parts and become sessile. |
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It is also suggested that the reef may be a source of pelagic larvae of sessile organisms that may settle on mangrove roots for greater diversity. |
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The synangium is sessile to pedicellate, consists of 2 3 microsporangia, the latter opening by horizontal slits. |
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They listed more than 80 taxa of which 38 were echinoderms, including 24 holothurians, 10 were fish and only 12 were sessile taxa. |
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Although most of the life of Obelia is spent in the sessile polyp form, medusa buds produced within reproductive polyps called gonangia escape into the water column. |
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On the other hand, most sessile barnacles have a pair of broad, often wrinkled extensions of the mantle wall, called branchiae. |
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Baryandra in either being tuberous, having a highly reduced number of stamens, lax and sessile androecia, or spurred fruit. |
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This suggests that ISMN induces the transition of sessile biofilm cells to free-swimming planktonic cells. |
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These two phenomena are especially critical for sessile higher plants. |
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Most animals are mobile to some extent, and a great many of the sessile varieties have a free-swimming larval stage. |
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Apothecia erumpent, sessile or with a very short central stalk, 2-4 mm in diameter. |
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The color of this plant is green olive to vinous red whose leaves are sessile. |
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Because anemones are sessile animals, staying put most of their lives, it is important for them to maintain dominance over their territory in competition for food and space. |
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This is serious because such sessile creatures are not merely part of the ecosystem. |
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The A158 ear always has paired spikelets, one sessile and one pedicellate. |
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Ovaries are located in the stalk of pedunculate barnacles and its homologue or in the basal lining of the mantle cavity in sessile barnacles. |
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The inflorescences are nodding or erect and usually feature two or more sessile flowers per node. |
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For example, mass regulation may be important only to flying, climbing, and cursorial animals, while avoidance will not be an option for any sessile or dormant animal. |
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Paranephelius is composed of acaulescent herbs with showy, yellow capitula, sessile in the center of a basal rosette of leaves, often with bullate leaf surfaces. |
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Chemical defenses of sessile organisms also can deter the growth or cause increased mortality of organisms that settle on them. |
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Hence results of generic sound propagation models are likely to be misleading with regard to exposure levels of sessile benthic species. |
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The sessile oak is more present in higher altitude and it likes to grow in large forests. |
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The fact that the slope faces north explains the presence of the beech which grows in mixture with the sessile oak. |
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The two species differ in their characteristics: pedunculated is more tannic, while sessile has greater aromatic expression. |
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A free-swimming tunicate larva metamorphoses into an attached, sessile adult with an atrium that surrounds the gills. |
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These specialized plants generally have spike-like compound inflorescences, comprised of paired cymules of tiny flowers that are sessile within succulent free or fused bracts. |
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The small size, pale colour and sessile nature of A. citrina makes it difficult to detect unless present in large numbers. |
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Ceiba speciosa flowers are relatively, pink colored and have staminal tube with sessile anthers, Table. |
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Major species include the English oak and ash, along with the sessile oak, birch, small leaved lime, field maple, cherry, hornbeam, aspen, sweet chestnut, rowan, whitebeam and willow. |
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The nervous system, ladderlike in some primitive pedunculate barnacles, is condensed in scalpellomorphans and sessile barnacles into a single mass. |
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The larvae of P. polonica are sessile parasites living on the roots of various herbs especially those of the perennial knawel growing on the sandy soils of Central Europe and other parts of Eurasia. |
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There are about a dozen important species of sessile and pedunculate barnacles that foul ships and submerged portions of marine installations, such as pier pilings, oil platforms, floats, buoys, and mooring cables. |
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The major neuroendocrine control centre of malacostracans is the X-organ sinus-gland compleX-organ sinus-glande eyestalk or in an equivalent part of the head in which the eyes are sessile. |
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However, without a human intervention, the chestnut grove cannot continue, the chestnut tree introduced in the Middle Ages does not resist to the competition with autochtonous species, particularly with the sessile oak. |
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Megafauna associated with crusts tend to be characterized by sessile filter feeders rather than by the mobile deposit feeders that have been associated with nodules. |
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Telia hypophyllous and on cones, waxy, reddish, linear, confluent, composed of single palisades of sessile teliospores that form just beneath and within the epidermis. |
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Development of enhancement opportunities should be initiated with sessile shellfish such as scallops and clams because their management is much simpler than that of mobile species. |
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Ecological monitoring will include an assessment of mortality by direct contact with the pollutant, for the vegetation, sessile fauna and the associated mobile fauna. |
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They support a vast range of sessile invertebrates and constitute the second Mediterranean ecosystem in terms of biodiversity, with over 1,700 species, a high percentage of which are also endemic. |
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It moves from the egg site to a suitable feeding location on the lower surface of the leaf where its legs are lost in the ensueing moult and the larva becomes sessile. |
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They are particularly useful since they are distributed worldwide and they are sessile. |
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Eastern oysters are filter feeders, so they are greatly affected by their surroundings since they are sessile organisms. |
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Usually it is a sessile skeletal organism, such as a bryozoan or an oyster, which grows along a substrate, covering other sessile sclerobionts. |
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They are particularly useful since they are sessile so that they are representative of the environment where they are sampled or placed. |
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The second type of gland found on butterwort leaves are sessile glands which lie flat on the leaf surface. |
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The radical leaves have a long petiole, while the leaves on the flowering stalks are usually sessile or with short petioles. |
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The rock surface of a rockpool is the substrate for a sessile organism such as a limpet. |
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On imaging, it appears as a well-circumscribed tumor, and intraoperatively, it presents as a sessile, polypoid mass arising from the synovium. |
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The sessile amoeba is encased in a hyaline, flattened lorica, which holds the MCB and connects to the meroplasmodium. |
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Nourishment may cause direct mortality to sessile organisms in the target area by burying them under the new sand. |
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The front parts of caves, overhangs and steep rock faces, where the light is greatly dimmed, populated by many sessile invertebrate species, and constituting landscapes of great aesthetic value. |
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Dominant are extended Luzulo-beech forests and partly large sessile oak populations. |
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The objective of this study was to investigate the effects of heat treatment on the physical and mechanical properties of sessile oak. |
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Borrowdale is covered in sessile oak woodland with ash, hazel and birch providing colour and variety. |
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The path left the lakeside and headed up the hill, over a stile into a woodland of lichen-encrusted sessile oaks and orange-berried rowans. |
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Llan Ffestiniog today is home to Ceunant Cynfal nature reserve,an internationally important scientific site for sessile oaks and mosses. |
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The third suborder of sessile barnacles, the Verrucomorpha, or wart barnacles, differs from the first two suborders in having the plates of the wall and operculum asymmetrically arranged. |
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Young males also have a crawler stage but become sessile and inactive after the second molt, passing through a more complete metamorphosis beneath the scale covering. |
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This type of asexual sociality forms the colonoids of sponges, coelenterates, bryozoans, hemichordates, and tunicate chordates, all of which were primitively small, sessile filter feeders. |
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Each receiver remains underwater for a period of approximately 12 months. This is long enough to allow colonisation by sessile animals such as hydroids, tunicates and bivalves. |
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This ancestor could have diversified into trees on the one hand and into monocaule of sessile rosettes on the other, and from polycarpic to monocarpic growth. |
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The naevus is a discrete, flat or slightly elevated sessile lesion. |
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This forms extremely tough, strong, elastic, byssal threads that secure the mussel to its substrate allowing it to remain sessile in areas of high flow. |
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The rate at which pots become incapacitated can be affected by their rate of decomposition, bioerosion, and engulfment through encrustation by sessile organisms. |
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Hill stated that mass mortality was particularly evident in sessile and slow moving benthic organisms in the St Lucia estuarine system, during periods of elevated salinities. |
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The varied upland landscape offers a vital habitat for dry heath, wet heath, mire, sessile oak woodland, reed bed, river, valley mire and marsh grasslands. |
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Once the prey is entrapped by the peduncular glands and digestion begins, the initial flow of nitrogen triggers enzyme release by the sessile glands. |
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